<style>
	.banner {
	    margin: 0 auto;
	    padding: 0;
	    width: 980px;
	}
	.logo {
	    float: left;
	    height: 64px;
	}
</style>



<div class="banner">
	<div class="logo">
		<a href="<?php echo url('default/index'); ?>"><img src="<?php echo $img_url; ?>logo.gif" /></a>
	</div>
</div>